Arc-lamp



H.E.MOUL

ARC LAMP. I

APPLICATION FILED JAN- 21. I909. 1,135,129. Patented Apr. 13, 1915.

. 2 SHEETS-SHEET 1.

V JKZ Z Z jikgzxi 77 ff 33 I /9 24 3 14 m O 35 f9 INVENTOR Maw AfToRNEY H. E. MOUL.

ARC LAMP.

APPLICATION FILED JAN. 21, 1909.

2 SHEETSSHEET 2.

Patented Apr. 13, 1915.

INVENTOR ma b ATT.0RNEY UNITED. STATES PATENT OFFICE.

CROIMIUELL A. B. HALVCRSON, JR., 0! LYNNE, MASSACHUSETTS,ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

To all whom it may concern:

Be it known that I, CROMWELL A. B. HAL VORSON, Jr., acitizen of the United States, residing at Lynn, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Arc-Lamps, of which the following is a specification. I

My invention relates to electric arc lamps and has forits object to improve the construction and operation of the same.

In the ordinary luminous arc lamp having a negative electrode of magnetite, titanium compound or similar materials which give a luminous or flaming arc, the amount of light which can be obtained from a single arc isl-limited by the amount of energy which can be effectively consumed in the are without over-heating the negative electrode so as to cause it to melt at the end and produce a disagreeable flickering of the are. In order to secure. a satisfaccharacter it is therefore necessary to make use of a plurality of arcs, and in oneof its aspects my invention consists in a novel construction and arrangement of lamp parts whereby a plurality of arcs may be effectively operated in unison so as to produce an intense high-energy light without having recourse to individual high-energy arcs.

Since it may not always be necessary or desirable to use the maximum amount of light which may be obtained in a lamp of the character described, the present invention contemplates means whereby different intensities of light may be obtained; and therefore, in another aspect,- the present invention may be considered as relating to an arc lamp so arranged that the light emanating therefrom may be varied in intensity.

While, specifically, my invention comprises a lamp having a pluralit ofpairs of electrodes and a plurality of arcs, the method of feeding and controlling each set of electrodes is applicable to lamps having but a single pair of electrodes and a single arc; and, --in a further aspect, my invention may therefore beconsidered as comprising a novel arrangement for regulating and controlling a pair of electrodes in such a mannor that the arcbetween them remains focused at a givenpoint.

I prefer to obtain the increased intensity of light by connecting a plurality of sets of ARC-LAMP.

Specification of Letters latent.

Application filed March 7, 1907. Serial No. 361,050.

' ing, wherein Patented Dec. 5, 1911.-

electrodes in parallel across the source and providing separate regulating and controlling means for each set of electrodes; and,

where the positive electrodes are non-consuming, they can conveniently be mounted upon a common floating support. In an-- other aspect my invention may therefore be regarded as comprising a novel arrangement of floating electrodes mounted on a common support so that each electrode may be controlled by its own regulating magnet.

The various features, of novelty characterizing my invention will be hereinafter particularly pointed out in the -claims; but for a full understanding of my invention, in its various aspects, reference may be had to the following detailed description taken in connection with the accompanying draw-' Figure 1 is a side elevation of a lamp arranged in accordance with a preferred form of my invention,-the casing and globe being usual central chimney 3 which also forms the backbone in the lamp'. Beneath the platform and in alinement with the chimney is an enlarged bell-shaped fume, box 4 across which extends the supporting member 5 of the positive electrodes. The member 5 is arranged Within vertical slots 6 in the walls of the fume box so as to be capable of limited vertical movements; normally it rests on stops such as cotter pins 7. Near the middle of this member are two electrodes 8 and 9 arranged parallel with each other and with the axis of the lamp. These elecv trodes-may be of copper.

10 and 11 are the negative electrodes which cooperate, respectively,-: with the electrodes- 8 and 9. The electrode 10 is sup- .supporting tube is fastened a flexible cable 15, which "passes over a pulley 16.and has magnets, as shown in Fig; 4, the cores 16 and '20 being provided with pins for moving these switches into their open positions and with other ins 36, for moving the switches into their c osed positions.-

The operation of the lamp is as follows: When the current is switched on, the shunt coil 24 is energized to raise its core, and theattached rod 22 and thus rock the crank bar 21 to movethe point of the electrode 2 into contact with the point of the electrode 1. At the same time, coil 19 is energized to raise its core 20 and the corresponding end of the rocker bar 9 and to depress the opposite end of the bar. The tilting movement of the bar 9 just specified will lower the electrode 1 and raise the electrode 2 until thecoil 19 is short-circuitedby the switch 33, when the" bar will return to its original position, thus flecting a rubbing contact between the points of the electrodes, provided the electrodes are suificiently low in the fireproof cup. If the electrodes, at the moment of starting, are high in the cup, the horizontal control mechanism will not move sufficiently to bring them into contact/ In such case, the coil 19 will continue to operate and, in addition to the rubbing contact above described, the electrodes will be fed downward by the operating engagement of the pawl 18 with successive teeth of the ratchet wheel 13. As soon as an electrical circuit through the electrodes is thus established, the coil 17 and l the blow coil 27 become energized and the latter operates to open the switch 28 and to interrupt the circuit through the coil 19. The action of the series coil .17 in operating the feeding mechanism, is controlled by the switch 26, which is operated by the coil 24,

and also by the switch 34, which is operated by the coil 17 itself. Under normal conditions, the switch 26 is closed, thus short-cir-.

cuiting the 'coil 17 this switch only coming 7 into operation when the voltage across electromagnet 24 rises. above a predetermined value. When such a condition occurs, the switch 26 is opened and the coil 17 becomes fully energized 'to raise the link 15 and thus cause'the pawl 14 to move the ratchet wheel '13, the distance of one tooth. The coil 17 is then short, circuited by the closing of the' switch, and the link drops to permit the pawl to engage another tooth of the ratchet wheel 13, this feeding action being repeated until the electrodes 1 and 2 are in proper operating relation. The action of the coil 19 takes place only when the current is unable to complete its circuit through. the electrodes, and the action immediately ceases when the circuit becomes established through the blow coil 27. v

- Referring now to the remainihg figures of the drawings, a modification isshown in which, instead of giving to the electrodes a rubbing action only "at the timeof starting wheel 30 and pawls 30 and 30*, the rocker bar 9 serving to feed the car on electrodes independently and alternate y, the carbon holders 3 and 4 being respectively provided with cords 31 and 32 that are connected to separate weights 31*, 32.

When current is supplied to the lamp shown in Figs. 5 to 8, the shunt coil 24 will first be energized to raise the rod22 and turn the crank bar 21 to move the point of the electrode 2 into engagement with or into proximity to the point of the electrode 1. If the electrodes are not in position to per form their functions, current will flow through the switch 28 and the coil 19, the

switch 26 having been opened by the pin to which it is attached and thus cause the pawl 29" to move the ratchet wheel 29 2111 amount corresponding to one tooth and thus feed the electrode 2 downward a corresponding amount. The upward movement of the core of coil 19 will close the switch 33 and thus short circuit the coil to permit the core to descend by the action of gravity. As the core descends, the pawl 30" will actuate the ratchet wheel 30 to feed the electrode 1 downward an amount represented by one tooth and the switch 33 will'be opened, the wheel 29 and 30 being respectively held against backward movement by thepawls the switch 28 and the coil 19 will be shunted through the switch 26 until the operating I conditions demand renewed feeding of the electrodes.

The invention may evidently be carried ,out in many ways and the formsof lamp described are intended merely by way of illustration and may obviously ,be considerably varied without departing from the scope of the invention;

Having now described my invention, what "I claim as new and desire to secure by Letters Patent, is

1. In an arc lamp, :1 pair of inclined con verging electrodes, means for causing the electrodes to approach each other transversely, and means simultaneously actuated therewith for moving one electrode longitudinally with reference to the other electrode. 1 i

2. In an arc lamp, :1 pair of inclined converging electrodes, means for causing the.

electrodes to approach each other transverse]; and simultaneously actuated means for e acting relative longitudinal movement of the electrodes.

3. In all are lamp, a of. inclined con -vided, .respectively, with a ratchet wheel 29, ..and pawls 29 and 29 and with a ratchet verging electrodes, means for causing the electrodes to approach each other transthe electrodes axially. Y

4. In an arc lamp, a pair'of inclined converging electrodes, means for causing the electrodes to approach each other transversely, and simultaneously actuated means for effecting relative longitudinal movement of the electrodes, said means also feeding the electrodes axially independent of said first means. 1

5. In an arc lamp, a pair of inclinedconverging electrodes, means for causing the electrodes to approach each other transversel and simultaneously actuated means for e ecting relative longitudinal movement of the electrodes, said means comprising a rocker arm, a pawl mounted thereon, and a ratchet wheel which engages said pawl in order to feed the electrodes axially.

i 6. In an arc lamp, a pair of inclined converging electrodes, means for causing the electrodes to .approach each other transversely, and means for efi'ecting longitudinal movement of the electrodes, said means comprising a rocker arm, a pawl mounted thereon, and a revoluble ratchet wheel from which the electrodes are suspended and subscribed my name this fifth .day

which is adapted to en age said pawl in order to feed the electrodes axially,

7 In an arc lamp, a pair of inclined con verging electrodes, means for causing the electrodes to approach each other transversely', and means for effecting longitudinal movement of the electrodes, sald means comprising a revoluble ratchet wheel, a rocker arm, and a pawl thereon adapted to engage the ratchet wheel to feed the electrodes axiall wheh the rocker arm is actuated.

8. 121 an arc lamp, a pair of inclined converging electrodes, a supporting cord or chainfor each electrode, a pulley for each cord or chain, a rocker arm upon the ends of which said pulleys are mounted, and means for rocln'ng said arm to produce relative movement between the electrodes.

9. In an arc lamp, a pair of inclined converging electrodes, means for roducin a forward axial movement of both electrodes, means for producing a relative axial movement between the two electrodes and means for producing a relative angular movement between the two electrodes.

In testimony whereof, I have hereunto of J anu- HERBERT EDMUND MOUL. Witnesses:

' 1 H. B. GREEN,

EUSTAGE H. BARKER.

ary 1909. 

